Electric bell-ringer.



No.888,340. I PATENTED MAY 19,1908. G. MAOLOSKIB.

ELECTRIC BELL RINGER.

APPLICATION FILED no.4. 1906.

Fig. I.

. Fig.2.

WiCnzsses I Invent or UNITED strnrns PATENT GEORGE MAOLOSKIE, OF SCHENEOTADY, NEW YORK, )ASBIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OE NEW YORK.

ELECTRIC BELL-RINGE'R.

Patented This); 1a, was. I

Application filed December 4, 1906. Serial No. 3%,235.

To all'whom it may concern:

Be it known that I, GEORGE MAcLosKIE, a citizen of the United States, residin at Schenectad county of Schenectady, tate of New York, have invented certain new and useful Im rovements in Electric Bell-Ringers, of which the following is a specification.

My invention relates to electric bell-ringers, and is particularly ap licable to the op eration of bells on electric, ocomotives.

The object of my invention is to provide a simple and efficient form of bell-ringer which may be applied to pivoted bells of the construction ordinarily employed on locomotives, and which, when 1ts circuit is closed, imparts to the bell a series of impulses at proper intervals forringing it, and which permits the bell to be operated manually in the usual way.

My invention will best be understood by reference to the accompanying drawings, in which Figure 1 shows somewhat dia rammatically a bell provided with a bcl -ringer ar ranged in accordance with my invention; Fi 2 shows a cross-sectional view of the be l-ring'er; and Fig. 3 shows a cross-sectional view on the dotted line 3 3, of Fig. 2.

In the drawings, A represents a pivoted bell of the usual construction, B represents a solenoid, inclosed in a suitable casing b, the core C of which is connected to the bell A by means of the link 0 secured to the core and on aging an arm a carried by the bell. This linlk c is slotted, as shown in Fig. 1, s oas to provide a lost-motion connection permitting the bell to be rotated manually through a complete revolution without shifting the core C of the solenoid. The core O carries a spindle D, extending downward through the casmg, on which are mounted two collars or abutments d. I

E represents a contact member loosely surrounding the spindle D between the collars d and comprislng a contact disk e which,

whenlowered, bridges the stationary contacts F mounted on the inside of the casing.

.A spring e is providedto act as a cushion when the contact 6 is brou ht into engagement with the contacts. The contact member E moves between strips G, which press against it on opposite sides so as to holdit in an position to which it is moved. Ad uStabih springs g are provided for adjusting the pressure of the strips G on the contact mem- The circuit connections of 'the'solen'oid are shown in Fig. 1, in which 1 represents the trolley or other current-collecting device, and J a resistance in series with the'soienoid.

The contacts F are connected to the tcrminals of the solenoid B, so that when they are bridged by the contact disk 6, the solenoid B is short-circuited.

K re resents a manually-operated switch adapte( to open and close the circuit of the bell-ringer.

The operation of the device is as follows:

When it is desired to operate the bell electrically the switch K is closed, as shown in Fig. 1. The. contact member E is initially in raised position, as shown in Fig. 2, so that the solenoid B is energized and draws down the core, rocking the ball. This downward movement is retarded by the dash-pot piston H.

When theupper collar d engages the contact 1n.emberE, it moves it downward, and when the contact disk e bridges the C01.ta0i3 F, the

solenoid is short-circuited and releases its core, which is carried upward by the weight of the bell. The upward movement of the core and spindle doesn'ot immediately open the short-circuit around the solenoid, on ac count of the lost-motion between the spindle D and the-contactvmember E, but when the lower collar d strikes the contact member 'E, this contact member is quickly raised, thereby breaking the shor t-circuit around the solen- 01d, which is again energized and again draws down its core. A series of impulses arethus imparted to the bell, and the interval between these im ulsesmay be adjusted by means of the das 1-pot to correspond with the natural period of swing of the bell. Thus a comparatively small amount of current is rerplired for operation of the device.

do not desire to limit myself to the particular construction and arrangement of parts here shown, but aim in the aipended claims to cover all modifications which are within the scope of my invention.

"What I claim as new anddesire to secure by Letters Patent of the United States, is,-

1. In combination witha pivoted bell, a solenoid, a core arranged for reciprocation therein, a lost motion connection between said core and said bell, a contact plate having a lost motion and yielding connection with said core, and fixed contacts with which said contact plate engages and thereby shortcircuits the solenoid after the core has moved in one direction.

2 In combination with a pivoted bell, a solenoid, a core arranged for reciprocation therein, a lost motion connection between said core and said bell, a contact plate havinga lost motion and yielding connection with said core, fixed contacts with which said contact late engages and thereby shortcircuits t 1e solenoid after the core has moved in one direction, and means for retarding the movement of the core in one dircetion.'

3. In combination with a pivoted bell, a

- Witnesses:

solenoid, connections between saidibell'and the core of said solenoid, acasing, a spindle but carried by said core within said casing, a ments on said spindle,

loosely surrounding said s indle said abutments, frictionally engaging the contact member. 4. In combination with a pivoted bell, a

between solenoid, connections the core of said solenoid, a casing, a spin le carried by said core within said casing, abutments' on said spindle, :a contact. member loosely surrounding said spindle between said abutnients, stationary membersafrictionally engaging the contact member, and a retarding[ means connected .to said spindle.

n witness whereof, I have hereunto set my hand this 3rd day of December, 1906.

GEORGE MACLOSKIE.

BENJAMIN B. HULL, HELEN Onnonn.

a contact member and a stationary member between said bell and 

